The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/limits.h

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    1 /*
    2  * Copyright (c) 1988, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)limits.h    8.3 (Berkeley) 1/4/94
   34  * $FreeBSD: releng/5.0/sys/i386/include/limits.h 100882 2002-07-29 17:41:23Z mike $
   35  */
   36 
   37 #ifndef _MACHINE_LIMITS_H_
   38 #define _MACHINE_LIMITS_H_
   39 
   40 #define CHAR_BIT        8               /* number of bits in a char */
   41 #define MB_LEN_MAX      6               /* Allow 31 bit UTF2 */
   42 
   43 /*
   44  * According to ANSI (section 2.2.4.2), the values below must be usable by
   45  * #if preprocessing directives.  Additionally, the expression must have the
   46  * same type as would an expression that is an object of the corresponding
   47  * type converted according to the integral promotions.  The subtraction for
   48  * INT_MIN, etc., is so the value is not unsigned; e.g., 0x80000000 is an
   49  * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
   50  * These numbers are for the default configuration of gcc.  They work for
   51  * some other compilers as well, but this should not be depended on.
   52  */
   53 #define SCHAR_MAX       0x7f            /* max value for a signed char */
   54 #define SCHAR_MIN       (-0x7f - 1)     /* min value for a signed char */
   55 
   56 #define UCHAR_MAX       0xff            /* max value for an unsigned char */
   57 
   58 #ifdef __CHAR_UNSIGNED__
   59 #define CHAR_MAX        UCHAR_MAX       /* max value for a char */
   60 #define CHAR_MIN        0               /* min value for a char */
   61 #else
   62 #define CHAR_MAX        SCHAR_MAX       /* max value for a char */
   63 #define CHAR_MIN        SCHAR_MIN       /* min value for a char */
   64 #endif
   65 
   66 #define USHRT_MAX       0xffff          /* max value for an unsigned short */
   67 #define SHRT_MAX        0x7fff          /* max value for a short */
   68 #define SHRT_MIN        (-0x7fff - 1)   /* min value for a short */
   69 
   70 #define UINT_MAX        0xffffffffU     /* max value for an unsigned int */
   71 #define INT_MAX         0x7fffffff      /* max value for an int */
   72 #define INT_MIN         (-0x7fffffff - 1)       /* min value for an int */
   73 
   74 /* Bad hack for gcc configured to give 64-bit longs. */
   75 #ifdef _LARGE_LONG
   76 #define ULONG_MAX       0xffffffffffffffffUL
   77 #define LONG_MAX        0x7fffffffffffffffL
   78 #define LONG_MIN        (-0x7fffffffffffffffL - 1)
   79 #else
   80 #define ULONG_MAX       0xffffffffUL    /* max value for an unsigned long */
   81 #define LONG_MAX        0x7fffffffL     /* max value for a long */
   82 #define LONG_MIN        (-0x7fffffffL - 1)      /* min value for a long */
   83 #endif
   84 
   85                         /* max value for an unsigned long long */
   86 #define ULLONG_MAX      0xffffffffffffffffULL
   87 #define LLONG_MAX       0x7fffffffffffffffLL    /* max value for a long long */
   88 #define LLONG_MIN       (-0x7fffffffffffffffLL - 1)  /* min for a long long */
   89 
   90 #if !defined(_ANSI_SOURCE)
   91 #define SSIZE_MAX       INT_MAX         /* max value for a ssize_t */
   92 
   93 #if !defined(_POSIX_SOURCE)
   94 #define SIZE_T_MAX      UINT_MAX        /* max value for a size_t */
   95 
   96 #define OFF_MAX         LLONG_MAX       /* max value for a off_t */
   97 #define OFF_MIN         LLONG_MIN       /* min value for a off_t */
   98 
   99 /* Quads and long longs are the same size.  Ensure they stay in sync. */
  100 #define UQUAD_MAX       ULLONG_MAX      /* max value for a uquad_t */
  101 #define QUAD_MAX        LLONG_MAX       /* max value for a quad_t */
  102 #define QUAD_MIN        LLONG_MIN       /* min value for a quad_t */
  103 #endif /* !_POSIX_SOURCE */
  104 #endif /* !_ANSI_SOURCE */
  105 
  106 #endif /* !_MACHINE_LIMITS_H_ */

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